It's a very mismatched set. Agatha is a witchy murder mystery writer, Nathan is a smug and preppy kid from an evangelical family, and Mercy is a demure puritan girl from the 1780s.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080